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Research & Grey LiteratureMCP serverFirst audited Nov 13, 2026

Research papers

arXiv, PubMed, Crossref and OpenAlex scholarly metadata.The vendor's description, from its MCP Registry listing.

Passed public checksAudited Nov 13, 2026

Every public check ran and passed. Public audit: we connect as an AI client would, list the tools and check what they say. We do not run them. How we audit

Does it work?
YesConnected in 458 ms.
Sign-up?
None neededIt answered without any account or key.
Can it change things?
No, read-onlyAll 38 tools say they only read.
Endpointhttps://fourzerotwo.si/mcp/v/research

Website Streamable HTTP · protocol 2025-11-25 · server version 1.1.0

What we checked, the evidence, and the tools it offers.

What we checked

Security

  • Passed: Connections are encrypted (HTTPS).

  • Passed: No hidden instructions found in tool text.

Safety labels

  • Passed: Every tool says whether it only reads or can change things.

Tools

  • Passed: 38 tools listed.

  • Passed: Every tool describes its inputs with a valid schema.

Protocol

  • Passed: The MCP handshake works (Streamable HTTP).

  • Passed: Protocol version 2025-11-25 (latest).

  • Passed: Unknown requests are refused.

Connection

  • Passed: The server responds.

Tools (38)

As the server describes them. The labels are the server's own: it says whether each tool only reads or can change things.

  • crossref__doiTitle, authors, journal, dates, references count and licence for a DOI. Free within the daily allowance, then $0.002 USDC per call via x402.Read-only
  • crossref__searchBibliographic search across Crossref works. Free within the daily allowance, then $0.003 USDC per call via x402.Read-only
  • crossref__journalJournal title, publisher and DOI counts by ISSN. Free within the daily allowance, then $0.002 USDC per call via x402.Read-only
  • crossref__fundersResearch funders by name, with Funder Registry ids. Free within the daily allowance, then $0.002 USDC per call via x402.Read-only
  • crossref__membersCrossref member publishers by name. Free within the daily allowance, then $0.002 USDC per call via x402.Read-only
  • pubmed__searchPubMed ids matching a query (supports PubMed query syntax). A few free samples a day, then $0.002 USDC per call via x402.Read-only
  • pubmed__summaryTitle, authors, journal, date and DOI for comma-separated PubMed ids. A few free samples a day, then $0.002 USDC per call via x402.Read-only
  • pubmed__pmc-searchFree full-text article ids in PubMed Central. A few free samples a day, then $0.002 USDC per call via x402.Read-only
  • pubmed__clinical-trials-searchPubMed citations that are clinical trial reports for a query. A few free samples a day, then $0.002 USDC per call via x402.Read-only
  • ror__searchFind research organisations by name, acronym or keyword, optionally filtered by country and type. Free within the daily allowance, then $0.001 USDC per call via x402.Read-only
  • ror__organisationFull record: names and aliases, types, status, founding year, location, website, domains, external ids. Free within the daily allowance, then $0.0005 USDC per call via x402.Read-only
  • ror__affiliationTurn a free-text affiliation (as printed on a paper) into the matching organisation, with ROR's confidence flag and candidates. Free within the daily allowance, then $0.001 USDC per call via x402.Read-only
  • ror__external-idFind the organisation for a GRID id, ISNI, Wikidata QID or Crossref Funder ID. Free within the daily allowance, then $0.001 USDC per call via x402.Read-only
  • ror__relationshipsParent, child and related organisations of a ROR record. Free within the daily allowance, then $0.001 USDC per call via x402.Read-only
  • scholarly__works-searchFull-text search of scholarly works, with citations, authors and open-access links. Free within the daily allowance, then $0.003 USDC per call via x402.Read-only
  • scholarly__workOne work by OpenAlex id (W…) or "doi:10.…". Free within the daily allowance, then $0.002 USDC per call via x402.Read-only
  • scholarly__authors-searchResearchers by name with h-index, works and citation counts. Free within the daily allowance, then $0.002 USDC per call via x402.Read-only
  • scholarly__authorOne researcher by OpenAlex id or ORCID. Free within the daily allowance, then $0.002 USDC per call via x402.Read-only
  • scholarly__institutions-searchUniversities and research institutions with output stats. Free within the daily allowance, then $0.002 USDC per call via x402.Read-only
  • scholarly__sources-searchJournals and repositories with impact stats. Free within the daily allowance, then $0.002 USDC per call via x402.Read-only
  • scholarly__topics-searchResearch topics and fields. Free within the daily allowance, then $0.002 USDC per call via x402.Read-only
  • scholarly__autocompleteFast title autocomplete across works. Free within the daily allowance, then $0.001 USDC per call via x402.Read-only
  • scholarly__citing-worksWorks that cite a given OpenAlex work id. Free within the daily allowance, then $0.003 USDC per call via x402.Read-only
  • arxiv__searchSearch arXiv by keywords, title, author and/or category; sort by relevance or newest. Costs $0.002 USDC per call via x402.Read-only
  • arxiv__paperFull metadata for up to 20 arXiv ids: title, authors, abstract, categories, dates, DOI, journal ref, links. Costs $0.001 USDC per call via x402.Read-only
  • arxiv__recentThe newest submissions in any arXiv category. Costs $0.002 USDC per call via x402.Read-only
  • arxiv__recent-cs-aiThe newest arXiv submissions in cs.AI (Artificial Intelligence). Costs $0.002 USDC per call via x402.Read-only
  • arxiv__recent-cs-lgThe newest arXiv submissions in cs.LG (Machine Learning). Costs $0.002 USDC per call via x402.Read-only
  • arxiv__recent-cs-clThe newest arXiv submissions in cs.CL (Computation and Language (NLP)). Costs $0.002 USDC per call via x402.Read-only
  • arxiv__recent-cs-cvThe newest arXiv submissions in cs.CV (Computer Vision). Costs $0.002 USDC per call via x402.Read-only
  • arxiv__recent-cs-crThe newest arXiv submissions in cs.CR (Cryptography and Security). Costs $0.002 USDC per call via x402.Read-only
  • arxiv__recent-cs-roThe newest arXiv submissions in cs.RO (Robotics). Costs $0.002 USDC per call via x402.Read-only
  • arxiv__recent-stat-mlThe newest arXiv submissions in stat.ML (Statistics: Machine Learning). Costs $0.002 USDC per call via x402.Read-only
  • arxiv__recent-quant-phThe newest arXiv submissions in quant-ph (Quantum Physics). Costs $0.002 USDC per call via x402.Read-only
  • arxiv__recent-astro-phThe newest arXiv submissions in astro-ph (Astrophysics). Costs $0.002 USDC per call via x402.Read-only
  • arxiv__recent-q-finThe newest arXiv submissions in q-fin (Quantitative Finance). Costs $0.002 USDC per call via x402.Read-only
  • arxiv__recent-econThe newest arXiv submissions in econ (Economics). Costs $0.002 USDC per call via x402.Read-only
  • arxiv__recent-q-bioThe newest arXiv submissions in q-bio (Quantitative Biology). Costs $0.002 USDC per call via x402.Read-only

Audit history

  1. Nov 13Passed

What we sent

Every request in this audit, with the answer and how long it took. We never send credentials and never call a tool.

RequestAnswerTime
initializeHTTP 200458 ms
initializedHTTP 202201 ms
tools/listHTTP 200170 ms
resources/listHTTP 200176 ms
prompts/listHTTP 200181 ms
unknown-methodHTTP 200181 ms

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